LangChain

LangChain is an open-source framework for developing applications powered by large language models (LLMs). LangChain simplifies every stage of the LLM application lifecycle, providing interoperable components and third-party integrations to simplify AI application development. Available in both Python and JavaScript libraries, LangChain’s tools and APIs streamline the process of building LLM-driven applications like chatbots and AI agents. The framework connects LLMs to private data and APIs to build context-aware, reasoning applications, enabling rapid movement from prototype to production through popular methods like retrieval-augmented generation (RAG) and chain architectures. LangChain is used by major companies including Google and Amazon for its versatility, performance, and extensive community support.